A long wire carries a current of 3.0 A along the axis of a long solenoid (radius = 3.0 cm, n = 900 turns/m, current = 30 mA). What is the magnitude of the magnetic field at a point 2.0 cm from the axis of the solenoid? Neglect any end effects
a. 34 mT
b. 64 mT
c. 30 mT
d. 45 mT
e. 4.0 mT
D
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Two mirrors are at right angles to one another. A light ray is incident on the first at an angle of 30°with respect to the normal to the surface. What is the angle of reflection from the second surface? ?
A. ?30° B. ?60° C. ?45° D. ?53° E. ?75°
The proper abbreviation for ‘grams' is ‘g.'
Indicate whether the statement is true or false
_________is the ratio of the resolution possible with the human eye divided by the resolution with a microscope.
Fill in the blank(s) with the appropriate word(s).
Essentially, the Great Red Spot is
A) traveling north and south across Jupiter's face. B) composed primarily of iron oxide. C) a large cyclonic storm (hurricane). D) always located within 10 degrees of Jupiter's north pole. E) Neptune's largest atmospheric feature.